@article{MOMA_1948__52_176780,
     author = {Walter Wunderlich},
     title = {Spiegelung am elliptischen {Paraboloid.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {13--37},
     publisher = {mathdoc},
     volume = {52},
     year = {1948},
     zbl = {0031.07101},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1948__52_176780/}
}